Some quickbread recipes I make do not result in a great looking top surface, even though they taste fine. They would benefit from either an eggwash or a milkwash. Obviously I can't brush a wash on a quickbread batter the way I would on a pie crust or cookie dough, i.e., before baking.
Does anyone have experience pulling a partially baked quickbread out of the oven to brush on a wash to get a nice-looking top? At what point in the bake should I do this? If so, which is preferable, egg or milk? I'm looking for shine and depth of color.